1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.util;
24  
25  import com.liferay.portal.kernel.util.StringPool;
26  import com.liferay.portal.kernel.util.StringUtil;
27  import com.liferay.portal.kernel.util.Validator;
28  
29  /**
30   * <a href="CreditCard.java.html"><b><i>View Source</i></b></a>
31   *
32   * @author Brian Wing Shun Chan
33   */
34  public class CreditCard {
35  
36      public static String hide(String number) {
37          return hide(number, StringPool.STAR);
38      }
39  
40      public static String hide(String number, String x) {
41          if (number == null) {
42              return number;
43          }
44  
45          int numberLen = number.length();
46  
47          if (numberLen > 4) {
48              StringBuilder sb = new StringBuilder();
49  
50              for (int i = 0; i < numberLen - 4; i++) {
51                  sb.append(x);
52              }
53  
54              sb.append(number.substring(numberLen - 4, numberLen));
55  
56              number = sb.toString();
57          }
58  
59          return number;
60      }
61  
62      public static boolean isValid(String number, String type) {
63          number = StringUtil.extractDigits(number);
64  
65          if (type.equals("visa")) {
66              if (!number.startsWith("4")) {
67                  return false;
68              }
69  
70              if (number.length() != 13 &&
71                  number.length() != 16) {
72  
73                  return false;
74              }
75          }
76          else if (type.equals("mastercard")) {
77              if (!number.startsWith("51") &&
78                  !number.startsWith("52") &&
79                  !number.startsWith("53") &&
80                  !number.startsWith("54") &&
81                  !number.startsWith("55")) {
82  
83                  return false;
84              }
85  
86              if (number.length() != 16) {
87                  return false;
88              }
89          }
90          else if (type.equals("discover")) {
91              if (!number.startsWith("6011")) {
92  
93                  return false;
94              }
95  
96              if (number.length() != 16) {
97                  return false;
98              }
99          }
100         else if (type.equals("amex")) {
101             if (!number.startsWith("34") &&
102                 !number.startsWith("35") &&
103                 !number.startsWith("36") &&
104                 !number.startsWith("37")) {
105 
106                 return false;
107             }
108 
109             if (number.length() != 15) {
110                 return false;
111             }
112         }
113 
114         return Validator.isLUHN(number);
115     }
116 
117 }